Outputs
Both acgen.jl and acstd.jl scripts generate image.data.i and green.data.i files. The image.data.i file stores the exact spectral function, i.e., $A_{\text{true}}(\omega)$. The green.data.i file stores the imaginary time Green's function $G(\tau)$ or the Matsubara Green's function $G(i\omega_n)$. The suffix $i$ in filename denotes index for tests. It starts from 1.
The acflow.jl script will output quite a few files. The most important one is Aout.data.i. For other possible output files, please refer to the documentation of the ACFlow toolkit. The Aout.data.i file stores the calculated spectral function, i.e., $A_{\text{calc}}(\omega)$. The suffix $i$ in filename also represents index for tests.
The aforementioned files are column-based plain texts. They can be opened by any text editor. Their file formats are summarized in Table 1.
As for the acplot.jl script, it will generate image.i.pdf files, which are image files for $A_{\text{true}}(\omega)$ and $A_{\text{calc}}(\omega)$. Actually, the data from the image.data.i and Aout.data.i files are used to generate the image.i.pdf file.
| Filename | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 | Number of lines |
|---|---|---|---|---|---|---|
| image.data.i | $\omega$ | $A_{\text{true}}(\omega)$ | - | - | - | $N_{\omega}$ |
| green.data.i | $\tau$ | $G(\tau)$ | $\text{Var}[G(\tau)]$ | - | - | $N_{\tau}$ |
| green.data.i | $i\omega_n$ | Re$G(i\omega_n)$ | Im$G(i\omega_n)$ | Var[Re$G(i\omega_n)$] | Var[Im$G(i\omega_n)$] | $N$ |
| Aout.data.i | $\omega$ | $A_{\text{calc}}(\omega)$ | - | - | - | $N_{\omega}$ |
Table 1 | File formats for selected files generated by the ACTest toolkit. Here, Var[$G$] means error bar for $G$. Re$G$ and Im$G$ mean real and imaginary parts of $G$, respectively.